Nacha Guevara
type: MusicGroup
genre: latin folk
genre: nueva trova
genre: singer-songwriter
genre: trova
description: Nacha Guevara (born Clotilde Acosta, October 3, 1940) is an Argentine singer-songwriter, dancer, and actress from Mar de Plata, Buenos Aires province. Biography Trained as a dancer and actress, she d
popularity: 26
followers: 13556
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58c4b19240007304c66689487f4a85d66ae799574286f550d7909f7a9864f29. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1e4839b-1dbd-4ac4-bf8c-18cbf2ba7354.json and https://artists.proofprofile.net/proofs/artist/e1e4839b-1dbd-4ac4-bf8c-18cbf2ba7354.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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album: No Hay Que Robar Zapatos
  type: MusicAlbum
  date published: 1968-07-17
album: La Papa / Lamento Indio
  type: MusicAlbum
  date published: 1968-08-21
album: Canción de Cuna Generacional
  type: MusicAlbum
  date published: 1968-09-21
album: Nacha Guevara Canta
  type: MusicAlbum
  date published: 1968-10-03
album: Las Damas de Beneficencia
  type: MusicAlbum
  date published: 1968-11-28
album: Me Tiro
  type: MusicAlbum
  date published: 1968-11-28
album: Anastasia Querida
  type: MusicAlbum
  date published: 1969-08-15
album: La Mala Memoria
  type: MusicAlbum
  date published: 1969-09-29
album: No Se Casen, Chicas
  type: MusicAlbum
  date published: 1969-10-06
album: Soy Snob
  type: MusicAlbum
  date published: 1969-10-06
album: Mezzo Soprano
  type: MusicAlbum
  date published: 1969-10-15
album: Nacha Guevara
  type: MusicAlbum
  date published: 1970-04-02
album: Nacha Guevara
  type: MusicAlbum
  date published: 1970-05-09
album: Nacha Guevara
  type: MusicAlbum
  date published: 1970-05-09
album: Nacha Guevara
  type: MusicAlbum
  date published: 1970-05-09
album: Nacha Guevara
  type: MusicAlbum
  date published: 1970-05-09
album: Este Es El Año Que Es (En Vivo)
  type: MusicAlbum
  date published: 1971-01-01
album: Nacha Canta Benedetti
  type: MusicAlbum
  date published: 1972
album: Nacha Canta Benedetti
  type: MusicAlbum
  date published: 1972-05-09
album: Nacha Canta Benedetti
  type: MusicAlbum
  date published: 1972-05-09
album: Canciones Para Mis Hijos
  type: MusicAlbum
  date published: 1973-05-08
album: Canciones Para Mis Hijos
  type: MusicAlbum
  date published: 1973-05-08
album: Las mil y una Nachas (En Vivo)
  type: MusicAlbum
  date published: 1973-08-30
album: Las Mil Y Una Nachas (En Vivo)
  type: MusicAlbum
  date published: 1974-03-08
album: En Vivo
  type: MusicAlbum
  date published: 1975-01-01
album: Nacha Guevara (En Vivo)
  type: MusicAlbum
  date published: 1975-01-01
  track: Yo Te Nombro - En Vivo
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    by artist: Nacha Guevara
    in album: Nacha Guevara (En Vivo)
      type: MusicAlbum
      date published: 1975-01-01
    genre: latin folk
    genre: nueva trova
    genre: singer-songwriter
    genre: trova
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523b19751779df318b3317f5ec876bd8096664ece172d006d7cb75658544b0ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARCUW7500011.
      date published: 2026-07-02T16:51:38Z
    audio: Yo Te Nombro - En Vivo
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      additional property: Tempo (BPM)
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      additional property: Danceability
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      additional property: Speechiness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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album: Nacha Guevara Canta a Benedetti (En Vivo)
album: Nacha Canta a Benedetti
album: Amor De Ciudad Grande
album: Nacha de noche (En vivo con Alberto Favero)
album: No Llores Por Mi Argentina
album: Nacha de noche (En Vivo)
album: Para cuando me vaya
album: Sus Primeras Grabaciones
album: Nacha Guevara canta a Benedetti (Grabado En Vivo en La Habana, Cuba)
album: Aqui Estoy
album: Grandes canciones de Nacha Guevara (Remaserizado 2015)
album: Los Patitos Feos
album: Inocencia
album: De Qué Se Ríe?
album: Argentinito Que Nacés
album: Buen Viaje con la Incomparable Nacha Guevara
album: Eva (El Gran Musical Argentino)
album: Eva: El Gran Musical Argentino
album: No llores por mí, Argentina (2015 Remastered)
album: No llores por mí, Argentina (2015 Remastered Version)
album: Nacha Guevara en Concierto (En Vivo)
album: New York, New York
album: Yira Yira
album: Se Dice De Mí
album: Heavy Tango
album: Te Quiero (En Vivo)
album: La Guevara
album: La vida en tiempo de Tango (directo)
album: En el 2000 También (En Vivo)
album: Éxitos Originales
album: Los Esenciales
album: Los Elegidos
album: De Cerca - 20 Canciones Esenciales
album: iCollection

Key Name
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value: F#

Mode Name
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value: Minor

Nacha Guevara Canta a Benedetti (En Vivo)
type: MusicAlbum
date published: 1976-01-01
track: Todavia - En Vivo
  type: MusicRecording
  duration: PT2M56S
  duration ms: 176133
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  by artist: Nacha Guevara
  in album: Nacha Guevara Canta a Benedetti (En Vivo)
    type: MusicAlbum
    date published: 1976-01-01
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ARCUW7600014
  additional property: CopyrightID
  additional property: CopyrightStatus
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    value: 2026-07-21T18:13:32+00:00
  additional property: CopyrightChainExplorerURL
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  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/959052
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARCUW7600014
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-21T21:15:43Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d3dcd1b5314cf2a1d8c90c145064c379581da4f3e51c211a0bfa9f8f34fe9. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:15:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARCUW7600014.
    date published: 2026-07-21T21:15:43Z
  audio: Todavia - En Vivo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 35.132
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
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    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.453
    additional property: Energy
      type: PropertyValue
      value: 0.591
    additional property: Speechiness
      type: PropertyValue
      value: 0.265
    additional property: Acousticness
      type: PropertyValue
      value: 0.937
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.694
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.621
    additional property: Loudness (dB)
      type: PropertyValue
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    additional property: Key Name
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    additional property: Mode Name
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Nacha Canta a Benedetti
type: MusicAlbum
date published: 1976-01-01

Amor De Ciudad Grande
type: MusicAlbum
date published: 1977
track: Valsecito
  type: MusicRecording
  duration: PT2M32S
  duration ms: 152906
  explicit: false
  by artist: Nacha Guevara
  in album: Amor De Ciudad Grande
    type: MusicAlbum
    date published: 1977
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ES5087700138
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
    type: PropertyValue
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    type: PropertyValue
    value: https://blockstream.info/api/block-height/958196
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5087700138
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T20:38:50Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c667f223bd6a26541fdd830028a97a94621bc1cefaea974d42fda0177ea83e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5087700138.
    date published: 2026-07-15T20:38:50Z
  audio: Valsecito
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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track: Ustedes y nosotros
  type: MusicRecording
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  duration ms: 162040
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  by artist: Nacha Guevara
  in album: Amor De Ciudad Grande
    type: MusicAlbum
    date published: 1977
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
    type: PropertyValue
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
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    date published: 2026-07-19T07:14:39Z
  audio: Ustedes y nosotros
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
      value: 0.033
    additional property: Acousticness
      type: PropertyValue
      value: 0.863
    additional property: Instrumentalness
      type: PropertyValue
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    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
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      value: 0.651
    additional property: Loudness (dB)
      type: PropertyValue
      value: -8.605
    additional property: Key Name
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track: Yo te nombro
  type: MusicRecording
  duration: PT4M0S
  duration ms: 240706
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  by artist: Nacha Guevara
  in album: Amor De Ciudad Grande
    type: MusicAlbum
    date published: 1977
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ES5087700136
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: CopyrightRegisteredAt
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    value: 2026-07-03T16:11:23+00:00
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Yo te nombro

CopyrightChainExplorerURL
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value: https://explorer.copyrightchains.com/tx/0x8848a4baa4fffae3abb7ad9e4571e8d71286d253099aa8ae1d59ef8dd313faf7

OTSHash
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OTSBitcoinBlock
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value: 956576

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/956576

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5087700136

OTSTimestamp
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OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8848a4baa4fffae3abb7ad9e4571e8d71286d253099aa8ae1d59ef8dd313faf7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5087700136.
date published: 2026-07-04T02:06:47Z

Yo te nombro
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additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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additional property: Energy
  type: PropertyValue
  value: 0.434
additional property: Speechiness
  type: PropertyValue
  value: 0.037
additional property: Acousticness
  type: PropertyValue
  value: 0.965
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.165
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.238
additional property: Loudness (dB)
  type: PropertyValue
  value: -7.274
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Nacha de noche (En vivo con Alberto Favero)
type: MusicAlbum
date published: 1977

No Llores Por Mi Argentina
type: MusicAlbum
date published: 1977-01-01

Amor De Ciudad Grande
type: MusicAlbum
date published: 1977-01-01

Nacha de noche (En Vivo)
type: MusicAlbum
date published: 1977-01-01

Para cuando me vaya
type: MusicAlbum
date published: 1978

Para cuando me vaya
type: MusicAlbum
date published: 1978-01-01

Para cuando me vaya
type: MusicAlbum
date published: 1978-01-01

Sus Primeras Grabaciones
type: MusicAlbum
date published: 1978-10-03

En Vivo
type: MusicAlbum
date published: 1979

Nacha Guevara canta a Benedetti (Grabado En Vivo en La Habana, Cuba)
type: MusicAlbum
date published: 1979-01-01

Aqui Estoy
type: MusicAlbum
date published: 1981
track: Construcción
  type: MusicRecording
  duration: PT5M2S
  duration ms: 302960
  explicit: false
  by artist: Nacha Guevara
  in album: Aqui Estoy
    type: MusicAlbum
    date published: 1981
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ES5099800496
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T06:42:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb5f04c51a55cb2af05eca77512e6f4114d5861715a839650d075e3b5f094d285
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958690
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958690
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5099800496
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T07:14:39Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f04c51a55cb2af05eca77512e6f4114d5861715a839650d075e3b5f094d285. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5099800496.
    date published: 2026-07-19T07:14:39Z
  audio: Construcción
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 87.867
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.545
    additional property: Energy
      type: PropertyValue
      value: 0.796
    additional property: Speechiness
      type: PropertyValue
      value: 0.041
    additional property: Acousticness
      type: PropertyValue
      value: 0.777
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.295
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.438
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.428
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Grandes canciones de Nacha Guevara (Remaserizado 2015)
type: MusicAlbum
date published: 1983

Los Patitos Feos
type: MusicAlbum
date published: 1984
track: Volverán las Oscuras Golondrinas
  type: MusicRecording
  duration: PT3M36S
  duration ms: 216200
  explicit: false
  by artist: Nacha Guevara
  in album: Los Patitos Feos
    type: MusicAlbum
    date published: 1984
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ARF100300322
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T23:58:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf37c26aa1f6ad5e301c47e68db11bb89158c3f534bd4f54638ae32039c08e920
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956634
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956634
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300322
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-04T10:04:33Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c26aa1f6ad5e301c47e68db11bb89158c3f534bd4f54638ae32039c08e920. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300322.
    date published: 2026-07-04T10:04:33Z
  audio: Volverán las Oscuras Golondrinas
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 128.79
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.427
    additional property: Energy
      type: PropertyValue
      value: 0.505
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.795
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.096
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.28
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.786
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Por Qué Cantamos
  type: MusicRecording
  duration: PT3M14S
  duration ms: 194800
  explicit: false
  by artist: Nacha Guevara
  in album: Los Patitos Feos
    type: MusicAlbum
    date published: 1984
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ARF100300318
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-03T02:42:04+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xb7c8cfebe1daf8c25c9bf83404c9d3c4ae671cf3556c580ba512204d1dda0f54
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956474
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956474
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300318
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T08:56:35Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8cfebe1daf8c25c9bf83404c9d3c4ae671cf3556c580ba512204d1dda0f54. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300318.
    date published: 2026-07-03T08:56:35Z
  audio: Por Qué Cantamos
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 64.421
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.58
    additional property: Energy
      type: PropertyValue
      value: 0.546
    additional property: Speechiness
      type: PropertyValue
      value: 0.07
    additional property: Acousticness
      type: PropertyValue
      value: 0.574
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.067
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.326
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.372
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: A Donde Van
  type: MusicRecording
  duration: PT3M33S
  duration ms: 213506
  explicit: false
  by artist: Nacha Guevara
  in album: Los Patitos Feos
    type: MusicAlbum
    date published: 1984
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ARF100300321
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T10:49:49+00:00
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: A Donde Van
track: Mi Ciudad
track: Vuelvo

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x5ac777a91b9152ffabe4e247ce92d5174cbaf1529f120120488bb1cdf9f54347

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 956711

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956711

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300321

OTSTimestamp
type: PropertyValue
value: 2026-07-04T22:48:52Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac777a91b9152ffabe4e247ce92d5174cbaf1529f120120488bb1cdf9f54347. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300321.
date published: 2026-07-04T22:48:52Z

A Donde Van
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 115.758
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.422
additional property: Energy
  type: PropertyValue
  value: 0.343
additional property: Speechiness
  type: PropertyValue
  value: 0.032
additional property: Acousticness
  type: PropertyValue
  value: 0.759
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.185
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.086
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.787
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Major

Mi Ciudad
type: MusicRecording
duration: PT4M24S
duration ms: 264066
explicit: false
by artist: Nacha Guevara
in album: Los Patitos Feos
  type: MusicAlbum
  date published: 1984
genre: latin folk
genre: nueva trova
genre: singer-songwriter
genre: trova
isrc code: ARF100300319
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-04T12:42:36+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x52aa64fe32d57b44228c2ea4c2171d7fb8eab80b39e5d1f2261f24bd97c3ccab
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956725
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956725
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300319
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-05T01:12:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa64fe32d57b44228c2ea4c2171d7fb8eab80b39e5d1f2261f24bd97c3ccab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300319.
  date published: 2026-07-05T01:12:41Z
audio: Mi Ciudad
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 167.622
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.443
  additional property: Energy
    type: PropertyValue
    value: 0.507
  additional property: Speechiness
    type: PropertyValue
    value: 0.16
  additional property: Acousticness
    type: PropertyValue
    value: 0.814
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.208
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.428
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.881
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major

Vuelvo
type: MusicRecording
duration: PT4M35S
duration ms: 275640
explicit: false
by artist: Nacha Guevara
in album: Los Patitos Feos
  type: MusicAlbum
  date published: 1984
genre: latin folk
genre: nueva trova
genre: singer-songwriter
genre: trova
isrc code: ARF100300325
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-21T17:18:51+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2baec3ea52e4783ae3edb0d153490f07f72284dee84366cbe05caca6adf12d4b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 959047
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/959047
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300325
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-21T20:07:48Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baec3ea52e4783ae3edb0d153490f07f72284dee84366cbe05caca6adf12d4b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:07:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF100300325.
  date published: 2026-07-21T20:07:48Z
audio: Vuelvo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 114.347
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.463
  additional property: Energy
    type: PropertyValue
    value: 0.484
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.797
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.532
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.141
  additional property: Loudness (dB)
    type: PropertyValue
    value: -6.859
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Los Patitos Feos
type: MusicAlbum
date published: 1984-01-01
track: Volverán las Oscuras Golondrinas
  type: MusicRecording
  duration: PT3M38S
  duration ms: 218506
  explicit: false
  by artist: Nacha Guevara
  in album: Los Patitos Feos
    type: MusicAlbum
    date published: 1984-01-01
  genre: latin folk
  genre: nueva trova
  genre: singer-songwriter
  genre: trova
  isrc code: ARCUW8400002
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T03:14:58+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe76a68f85b9d91d730150d6845725ad833e47f5eba8d476fa7f3300d4bd5bc08
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958816
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958816
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARCUW8400002
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T03:51:05Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
  subject of: OpenTimestamps Proof of Existence
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Inocencia
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De Qué Se Ríe?
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Argentinito Que Nacés
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Buen Viaje con la Incomparable Nacha Guevara
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Eva (El Gran Musical Argentino)
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Eva: El Gran Musical Argentino
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No llores por mí, Argentina (2015 Remastered)
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New York, New York
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Yira Yira
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Se Dice De Mí
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Te Quiero (En Vivo)
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La Guevara
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La vida en tiempo de Tango (directo)
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Éxitos Originales
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De Cerca - 20 Canciones Esenciales
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iCollection
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Viva Sevilla
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80 y Cantando
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Me Cansé
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Me Cansé
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80 y Cantando
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Voy A Cantar Lo Que Se Me Canta
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Recordando a Nacha Guevara
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Queridos Odiadores
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